package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.service.SetmealService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    @Override//新增菜品和对应的口味
    @Transactional//事务，要不然全成功，要不然全失败，并且在启动类上加相应注解
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表插入一条数据
        dishMapper.insert(dish);

        Long dishId = dish.getId();//获得dish主键值

        //向口味表加入多条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();//拿到口味数据
        if (flavors != null && flavors.size() > 0) {

            flavors.forEach(dishFlavor ->
                    dishFlavor.setDishId(dishId));

            dishFlavorMapper.insertBatch(flavors);//插入口味数据
        }

    }

    @Override//菜品分页查询
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //开始分页
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());

        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);


        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override//批量删除菜品
    @Transactional//涉及多个表，加上事务注解
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够删除--起售中菜品不能删
        for (Long id : ids) {
            Dish dish = dishMapper.getByid(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //当前菜品处于起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否能够删除--套餐中菜品不能删除
        List<Long> setmealIds = setmealDishMapper.getSetmealIdByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        /*for (Long id : ids) {
            dishMapper.deleteById(id);
            dishFlavorMapper.deleteByDishId(id);//根据菜品id删除方法
        }*/

        //批量删除
        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);


    }

    @Override//根据id查询数据用于回显
    public DishVO getByIdWithFlavor(Long id) {

        //根据id查询菜品数据
        Dish dish = dishMapper.getByid(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);

        //封装数据到dishvo
        return dishVO;

    }

    @Override//修改菜品和关联的口味
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品表基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);


        //修改菜品对应的口味信息
        dishFlavorMapper.deleteByDishId(dish.getId());
        //删除对应的口味数据

        List<DishFlavor> flavors = dishDTO.getFlavors();//拿到口味数据
        if (flavors != null && flavors.size() > 0) {

            flavors.forEach(dishFlavor ->
                    dishFlavor.setDishId(dishDTO.getId()));

            dishFlavorMapper.insertBatch(flavors);//插入口味数据
        }
    }


    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    @Override//启用禁用菜品
    public void startOrstop(Integer status, Long id) {
        log.info("状态{}", status);


        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);



        /*Setmeal setmealIds = setmealDishMapper.getSetmealIdByDishIds(ids);
        if (setmealIds!=null && setmealIds.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);*/


    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d, dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}

